1、BSI Standards PublicationBS 8558:2015Guide to the design,installation, testing andmaintenance of servicessupplying water fordomestic use withinbuildings and theircurtilages Complementaryguidance to BS EN 806Publishing and copyright informationThe BSI copyright notice displayed in this document indic
2、ates when the documentwas last issued. The British Standards Institution 2015Published by BSI Standards Limited 2015ISBN 978 0 580 86314 1ICS 91.140.60The following BSI references relate to the work on this document:Committee reference B/504/2Draft for comment 15/30299694 DCPublication historyFirst
3、published as BS 6700 April 1987Second edition, April 1997Third edition, December 2006First published as BS 8558, December 2011Second (present) edition as BS 8558, September 2015Amendments issued since publicationDate Text affectedBS 8558:2015 BRITISH STANDARDContentsForeword iii0 Introduction 11 Sco
4、pe 32 Normative references 33 Terms and definitions 74 Guidance on BS EN 806-2 135 Guidance on BS EN 806-4 546 Guidance on BS EN 806-5 67AnnexesAnnex A (informative) Examples of pumped systems 71Annex B (informative) Guidance on the calculation of hot water storagecapacity 76Annex C (informative) Pi
5、pe sizing calculations 79List of figuresFigure 1 Example of service pipe 10Figure 2 Example of pipework for installation of domestic water softener 21Figure 3 Locations of stopvalves in blocks of flats with separate supply pipes toeach flat 25Figure 4 Locations of stopvalves in blocks of flats suppl
6、ied from a commonsupply pipe 26Figure 5 Example of a pre-assembled external meter installation 28Figure 6 Schematic example of a direct (vented) hot water system 31Figure 7 Schematic example of an indirect (vented) hot water system 32Figure 8 Schematic example of an indirect unvented (vented primary
7、)hot water system 33Figure 9 Schematic example of an indirect unvented (sealed primary) hot watersystem 34Figure 10 Schematic example of a vented primary circuit with close coupledfeed and open vent 35Figure 11 Typical examples of pipes entering buildings 43Figure 12 Accessibility of pipework 47Figu
8、re 12 Accessibility of pipework 48Figure 13 Clear space needed above cisterns 50Figure 14 Limits for notching and drilling of solid timber floor joists 61Figure 14 Limits for notching and drilling of solid timber floor joists 62Figure 15 Directions of thrusts developed in a pipeline due to internalp
9、ressure 65Figure 16 Cutting off redundant pipes 70Figure A.1 Indirect boosting from break cistern to storage cistern 72Figure A.2 Indirect boosting with hydraulic accumulator 73Figure A.2 Indirect boosting with hydraulic accumulator 74Figure A.3 Direct boosting 75Figure C.1 Conversion of loading uni
10、ts to design flow rate 81Figure C.2 Determination of pipe diameter Water at 10 C 83Figure C.3 Head loss through stopvalves 86Figure C.4 Head loss through float-operated valves 87List of tablesTable 1 Cross references to the BS EN 806 series and this British Standard 1Table 2 Drawing symbols for BS 8
11、558 12Table 3 British Standards for stopvalves 24BRITISH STANDARD BS 8558:2015 The British Standards Institution 2015 iTable 4 Sizes of open vent pipes 30Table 5 Pipe design flow rates for outlet fittings and appliancesA), B)38Table 6 Calculated minimum thickness of thermal insulation to protect cop
12、perpipes fixed inside premises for domestic cold water systems 44Table 7 Calculated minimum thickness of thermal insulation to protect copperpipes fixed inside premises against freezing for commercial and institutionalapplications 45Table 8 Examples of insulating materials 45Table 9 Jointing of copp
13、er tube and stainless steel tube 56Table 10 Thrust per bar internal pressure 65Table 11 Bearing capacity of soils 65Table B.1 Minimum sizes of storage vessel for Case 1 78Table B.2 Minimum sizes of storage vessel for Case 2 78Table C.1 Loading unit: Hot or cold supply 80Table C.2 Typical equivalent
14、pipe lengths (copper, plastics and stainlesssteel) 84Table C.3 Typical loss of pressure through UK low resistance taps andequivalent pipe lengths 84Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv,pages 1 to 92, an inside back cover and a back cover.BRITISH
15、 STANDARDBS 8558:2015ii The British Standards Institution 2015ForewordPublishing informationThis British Standard is published by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 30 September 2015. Itwas prepared by Sub-committee B/504/2, Internal s
16、ystems and components,under the direction of Technical Committee B/504, Water Supply. A list oforganizations represented on these committees can be obtained on request totheir secretary.SupersessionThis British Standard supersedes BS 8558:2011, which is withdrawn.Information about this documentThe c
17、ontent of this British Standard was originally taken fromBS 6700:2006+A1:2009, which was withdrawn on publication of BS EN 806 (allparts). This is a full revision of the standard to keep it up to date.Figure 12f) is reproduced by permission of the Water Regulations AdvisoryScheme (WRAS). Copyright i
18、s claimed on these figures. Copyright holders areWRAS, Willow Road, Pen y Fan Industrial Estate, Crumlin, Gwent NP11 4EG.Figure 15 is reproduced by permission of the Chartered Institute of Plumbingand Heating Engineering (CIPHE). Copyright is claimed on these figures.Copyright holders are CIPHE, 64
19、Station Lane, Hornchurch, Essex RM12 6NB,United Kingdom.Presentational conventionsThe guidance in this standard is presented in roman (i.e. upright) type. Anyrecommendations are expressed in sentences in which the principal auxiliaryverb is “should”.Commentary, explanation and general informative ma
20、terial is presented insmaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a British Standard cann
21、ot confer immunity from legalobligations.In particular, attention is drawn to the following statutory regulations whichmay be amended from time to time. The Water Industry Act 1981 1; The Water and Sewerage Services (Northern Ireland) Order 2006, asamended 2; The Water (Scotland) Act 1980, as amende
22、d 3; The Workplace (Health, Safety and Welfare) Regulations 1992 4; The Electricity Safety, Quality and Continuity Regulations 2002, asamended 5; The Electricity Safety, Quality and Continuity Regulations (NorthernIreland) 2012 6; The Control of Asbestos at Work Regulations 2002 7; The Control of As
23、bestos at Work Regulations (Northern Ireland) 2003 8;BRITISH STANDARD BS 8558:2015 The British Standards Institution 2015 iii The Water Industry Act 1999 9; The Health and Safety at Work etc. Act 1974 10; The “Water Quality Regulations”, which set out provisions for the quality ofdrinking water prov
24、ided by a public water supplier (water undertaker): The Water Supply (Water Quality) Regulations 2000, as amended, inEngland 11; The Water Supply (Water Quality) Regulations 2010, as amended, inWales 12; The Water Supply (Water Quality) Regulations (Northern Ireland) 2007,as amended, in Northern Ire
25、land 13; The Public Supply Water Supplies (Scotland) Regulations 2014, inScotland 14; The “Private Water Supplies Regulations”, which set out provisions for thequality of water from a private supply: The Private Water Supplies Regulations 2009, as amended, inEngland 15; The Private Water Supplies (W
26、ales) Regulations 2010, as amended, inWales 16; The Private Water Supplies (Scotland) Regulations 2006, in Scotland 17; The Private Water Supplies (Northern Ireland) Regulations 2009,as amended, in Northern Ireland 18; The “Water Fittings Regulations”, which set out provisions for plumbingsystems in
27、 premises to which a supply of public mains water has beenprovided: The Water Supply (Water Fittings) Regulations 1999, in England andWales 19; The Water Supply (Water Fittings) (Scotland) Byelaws 2014, inScotland 20; The Water Supply (Water Fittings) Regulations (Northern Ireland) 2009,in Northern
28、Ireland 21; The “Building Regulations”: The Building Regulations 2010 22; The Building (Scotland) Regulations 2004, as amended 23; The Building Regulations (Northern Ireland) 2012, as amended 24.BRITISH STANDARDBS 8558:2015iv The British Standards Institution 20150 IntroductionTable 1 provides cross
29、 references to the BS EN 806 series and thisBritish Standard.Table 1 Cross references to the BS EN 806 series and this British StandardBS EN 806 part and clause(1 of 3)BS 8558 clauseBS EN 806-1:2000+A1:2002Scope, Clause 1 No additional guidanceNormative references, Clause 2 No additional guidanceObj
30、ectives, Clause 3 No additional guidanceCompetence and duties for design, construction and operation, Clause 4 No additional guidanceTerms and definitions, Clause 5distributing pipe, 5.3.4 3.1.13service pipe, 5.3.1 3.1.28service stopvalve, 5.4.2 3.1.29supply pipe, 5.3.2 3.1.36supply stopvalve, 5.4.3
31、 3.1.37Graphic symbols and abbreviations, Clause 6 No additional guidanceExamples for the use of graphic symbols, Annex A No additional guidanceBS EN 806-2:2005Scope, Clause 1 No additional guidanceNormative references, Clause 2 No additional guidanceGeneral requirements, Clause 3 No additional guid
32、ancePrivate water supplies, Clause 4 No additional guidanceAcceptable materials, Clause 5 4.2.1 and 4.2.3Choice of material, 5.1 4.2.2Components, Clause 6 No additional guidancePipework inside buildings, Clause 7 No additional guidanceCold potable water services, Clause 8 No additional guidanceHot w
33、ater systems, Clause 9 No additional guidancePrevention of bursting, Clause 10Discharge pipes, 10.2.5 4.2.3Guidelines for water meter installations, Clause 11 No additional guidanceWater conditioning, Clause 12 No additional guidanceAcoustics, Clause 13 No additional guidanceProtection of systems ag
34、ainst temperatures external to pipes, fittings andappliances, Clause 14No additional guidanceBoosting, Clause 15 No additional guidancePressure reducing valves, Clause 16 No additional guidanceCombined drinking water and fire fighting services, Clause 17 No additional guidancePrevention of corrosion
35、 damage, Clause 18 No additional guidanceAdditional requirements for vented cold and hot water systems, Clause 19 No additional guidanceList of acceptable materials (non-exhaustive), Annex A No additional guidanceAspects for water conditioning, Annex B No additional guidanceSupplementary guidance 4.
36、3BRITISH STANDARD BS 8558:2015 The British Standards Institution 2015 1Table 1 Cross references to the BS EN 806 series and this British StandardBS EN 806 part and clause(2 of 3)BS 8558 clauseBS EN 806-3:2006Scope, Clause 1 No additional guidanceNormative references, Clause 2 No additional guidanceT
37、erms, symbols and units, Clause 3 No additional guidancePrinciples of pipe sizing calculations, Clause 4 No additional guidanceSimplified method of pipe sizing, Clause 5 4.3.30 and Annex CSpecial-installations, Clause 6 No additional guidanceExample for the determination of pipe sizes for standard i
38、nstallations,Annex ANo additional guidanceDesign flow rates in relation to total flow rates, Annex B No additional guidanceList of national pipe sizing methods, Annex C No additional guidanceBS EN 806-4:2010Scope, Clause 1 No additional guidanceNormative references, Clause 2 No additional guidanceTe
39、rms and definitions, Clause 3 No additional guidanceWork on site, Clause 4General, 4.1 5.1.1General, 4.4.1 5.1.2Pipe materials and jointing methods, 4.4.2 5.1.3Underground pipe laying, 4.6 5.2.1Allowances for thermal movement and prevention of noise, 4.7.1 5.1.4Fixings for insulated piping, 4.7.2.6
40、5.1.5Piping passing through structures, 4.7.4 5.1.6Valves and taps, 4.8 5.1.7Record of installation, 4.9.3 5.1.8Dissimilar metals, Clause 5 No additional guidanceCommissioning, Clause 6General, 6.1.1 5.1.9Pipe system material specifications, jointing procedures and pipeinstallation for different typ
41、es of materials, Annex ANo additional guidanceCalculation and compensation for thermal effects of pipes, Annex B No additional guidanceRecommended maximum spacings of fixings for metal pipes, Annex C No additional guidanceSupplementary guidance 5.2BS EN 806-5:2012Scope, Clause 1 No additional guidan
42、ceNormative references, Clause 2 No additional guidanceTerms and definitions, Clause 3 No additional guidanceGeneral, Clause 4 6.1.1 and 6.1.2Documentation, Clause 5 No additional guidanceOperation, Clause 6 6.1.2 and 6.1.3Interruptions to operation and disconnection, Clause 7 No additional guidance
43、Resumption of supply, Clause 8 No additional guidanceDamage and faults, Clause 9Change in water quality, 9.1 6.1.4Alterations, extensions and refurbishment, Clause 10 No additional guidanceAccessibility of fittings, Clause 11 No additional guidanceMaintenance, Clause 12 No additional guidanceBRITISH
44、 STANDARDBS 8558:20152 The British Standards Institution 2015Table 1 Cross references to the BS EN 806 series and this British StandardBS EN 806 part and clause(3 of 3)BS 8558 clauseAdditional requirements for vented systems, Clause 13Cisterns, 13.1 6.1.5Inspection and maintenance, Clause 14 No addi
45、tional guidanceRecommended frequencies for inspection and maintenance of componentsfor drinking water installations, Annex ANo additional guidanceInspection and maintenance procedures, Annex BPipework, B.22 6.1.6Specific inspection and maintenance procedures for water conditioningdevices, Annex CNo
46、additional guidanceSupplementary guidance 6.21 ScopeThis British Standard provides complementary guidance to BS EN 806. It is aguide to the design, installation, alteration, testing, operation and maintenanceof services supplying water for domestic use within buildings and theircurtilages.BS EN 806
47、does not cover underground pipework, but this British Standard givesguidance on underground pipework within the curtilage of a building.This British Standard does not cover:a) the detailed methods of chemical treatment and maintenance of waterdistribution systems;b) workmanship; orc) space heating s
48、ystems.NOTE Annex A gives examples of pumped systems. Annex B provides guidance onthe calculation of hot water storage systems, while Annex C provides calculations forpipe sizing.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocument and are in
49、dispensable for its application. For dated references, onlythe edition cited applies. For undated references, the latest edition of thereferenced document (including any amendments) applies.BS 1010-2, Specification for draw-off taps and stopvalves for water services(screw-down pattern) Part 2: Draw-off taps and above-ground stopvalves1)BS 1710, Specification for identification of pipelines and servicesBS 245
